Efficient nonlinear reanalysis of skeletal structures using combined approximations

Oded Amir, Uri Kirsch, Izhak Sheinman

Research output: Contribution to journalJournal articleResearchpeer-review


Non-linear reanalysis of large-scale structures usually involves much computational effort, because the set of non-linear equations must be solved repeatedly during the solution process. Various approximations that are often used for linear reanalysis are not sufficiently accurate for non-linear problems. In this study, solution procedures based on the combined approximations approach are developed and compared in terms of efficiency and accuracy. Various path-independent non-linear analysis and reanalysis problems are considered, including material non-linearity, geometric non-linearity and buckling analysis. Numerical examples demonstrate the effectiveness of the procedures presented. It is shown that in various cases accurate results can be achieved efficiently.
Original languageEnglish
JournalInternational Journal for Numerical Methods in Engineering
Issue number9
Pages (from-to)1328-1346
Publication statusPublished - 2008
Externally publishedYes


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